Package includes Self-heating knee pads, 1 pair (2/2) * Size Chart: M --- Length: 27cm / 10.6 inch Suitable for leg circumference: 30-39cm / 11.8-15.4 inch Suitable for weight: 40-60kg L --- Length: 27cm / 10.6 inch Suitable for leg circumference: 40-47cm / 15.7-18.5 inch Suitable for weight: 60-75kg XL --- Length: 27cm / 10.6 inch Suitable for leg circumference: 48-60cm / 18.9-23.6 inch Suitable for weight: 75-95kg Specifications: 1. Material: POLYESTER + Latex 2. Color: gray, beige, black 3. Weight: 148g per pair 4. Size: M, L, XL 5. Suitable for: adult men and women 6. Applicable scene: football, basketball, volleyball, tennis, badminton, golf, climbing, hiking, cycling, running, sports etc. 7. Please allow 1-2cm measuring deviation due to manual measurement 8. Due to different monitors and lighting conditions, colors may be slightly different from the listed photos About the product: 1. Made of high quality elastic with seamless construction, skin-friendly for both men and women, comfortable, breathable and soft materials, helps to provide relief and compression. 2. Adopting self-heating material which will help to improve blood circulation, promote metabolism, clear the meridians and enhance immunity. 3. Good compression can fully cover the knee, give proper pressure to prevent your knees from sliding, provides warmth, comfort, superior flexibility and durability for daily wearing 4. The knee sleeves are great for supporting and protecting your knee, suitable for all sports and athletic activities 5. Elastic knee support, provides support, high-quality fabric to keep warm and prevent knee injuries, lightweight, breathable, not stuffy, comfortable to wear, great stretch allows you to move freely and flexibly.